WSP12486

• File Number: 8221.109
• Description: Colorado River Basin Projects - Long Hollow
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 5/1/2004
• Author: Wright Water Engineers
• Title: Long Hollow Dam and Reservoir - Phase I Summary Report - Preliminary Drafts - ‎(no final)‎ 05-01-04 through 06-01-04
• Water Supply Pro - Doc Type: Report/Study

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TABLE OF CONTENTS

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1.0 INTRODUCTION..................................................................................................... ........ 1

1 .1 Study Objective and Scope...................................................... ................................. ..... ..... 1

1 .2 Project Location................................................................................................................... 2

1 .3 Project Purpose................................................................................................................... 2

1.4 Project Need...................................................................................................... ............. ..... 2

1.5 Water Rights.......................................................................................................... ............ ..4

2.0 REVIEW OF EXISTING DATA.. ...................... ................ ................. ......... ...... ................4

3.0 TOPOG RAPHY ............................................................................................................... 5

4.0 GEOLOGIC RECON NAISSANC E ....................................................... ......................... ~

5.0 GROUNDWATER HyDROLOGy............... ................ ....................... .......... .................... 6

6.0 I NSTITUTIONAl ISSUES................................................... ........................... ............... ~

6.1 National Environmental Policy Act (NEPA)........................................................................~
6.2 Threatened and Endangered Species (T&E) ......................................................................8
6.2.1 Federally Listed Species Considered and Evaluated ..........................................8

6.2.2 Sensitive Species............................................................................................... ~8
6.2.3 Summary of Conclusions of T&E Species Evaluation .........................................9
6.2.4 San Juan River Basin Recovery Implementation Plan (RIP) ...............................9

6.3 Wetlands......................................................................................................................... 109

6.3.1 Direct Impacts ........... ..................................................................... .................. 109
6.3.2 Preliminary Mitigation Plan.............. .................... ............................................11 W

6.4 Cultural Resources............................................................................................................ 11

6.5 Indian Trust Assets................................................................................................. ....... 12-14
6.5 Findings ot Institutional Investigations ........................................................................... 1~

7 .0 WATER QUALITY.... ........ ....................................................................... ......... ......... 13t2

8.0 INSTITUTIONAL CONSTRAINTS ............................................................ ................. 1443

8.1 Water Allocation and Reservoir Operations ..................................................................1443

8.2 Payment Issues............................................................................................................. 1644

8.3 Local Consultations....................................... ................................................................ 164-a

8.4 Rights-ot-Way.......................................................................................................... ...... 174-a

8.5 Permitting ...................................................................................................................... 17.:t-6
8.6 Reconnaissance Level Opinion ot Cost and Financing ................................................. 18.:t-6

9.0 SUMMARY OF FEASIBILITY STUDY FINDINGS..................................................... 1941